Security Bulletin: IBM Dynamic System Analysis (DSA) Preboot is affected by vulnerabilities in X.Org libX11.

Summary

IBM Dynamic System Analysis (DSA) Preboot has addressed the following vulnerabilities in X.Org libX11.

Vulnerability Details

Summary

IBM Dynamic System Analysis (DSA) Preboot has addressed the following vulnerabilities in X.Org libX11.

CVEID: CVE-2016-7942

Description: X.Org libX11 could allow a remote attacker to execute arbitrary code on the system, caused by an out-of-bounds read in the XGetImage() function. An attacker could exploit this vulnerability to execute arbitrary code on the system.

CVSS Base Score: 7.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/117541&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2013-7439

Description: libX11 is vulnerable to a buffer overflow, caused by improper bounds checking by MakeBigReq macro. By sending an overly long MakeBigReq() value, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

CVSS Base Score: 6.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/102137&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVEID: CVE-2013-1981

Description: X.Org libX11 is vulnerable to a buffer overflow, caused by multiple integer overflow errors within the XQueryFont(), _XF86BigfontQueryFont(), XListFontsWithInfo(), XGetMotionEvents(), XListHosts(), XGetModifierMapping(), XGetPointerMapping(), XGetKeyboardMapping(), XGetWindowProperty(), and XGetImage() functions. By sending specially-crafted data, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

CVSS Base Score: 7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/84494&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVEID: CVE-2013-1997

Description: X.Org libX11 is vulnerable to a buffer overflow, caused by multiple integer overflow errors within the XAllocColorCells(), _XkbReadGetDeviceInfoReply(), _XkbReadGeomShapes(), _XkbReadGetGeometryReply(), _XkbReadKeySyms(), _XkbReadKeyActions(), _XkbReadKeyBehaviors(), _XkbReadModifierMap(), _XkbReadExplicitComponents(), _XkbReadVirtualModMap(), _XkbReadGetNamesReply(), _XkbReadGetMapReply(), _XimXGetReadData(), XListFonts(), XListExtensions(), and XGetFontPath() functions. By sending specially-crafted data, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

CVSS Base Score: 7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/84495&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVEID: CVE-2013-2004

Description: X.Org libX11 is vulnerable to a buffer overflow, caused by multiple integer overflow errors within the GetDatabase() and _XimParseStringFile() functions. By sending specially-crafted data, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

CVSS Base Score: 7.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/84496&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P)

Affected products and versions

Remediation/Fixes

Firmware fix versions are available on Fix Central: <http://www.ibm.com/support/fixcentral/&gt;

Workarounds and Mitigations

None.

References

• Complete CVSS V2 Guide
• On-line Calculator V2
• Complete CVSS V3 Guide
• On-line Calculator V3

Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Lenovo Product Security Advisories

Acknowledgement

None.

Change History
21 November, 2017: Original Version Published

• The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an “industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response.” IBM PROVIDES THE CVSS SCORES “AS IS” WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.